TWA 212÷1102 S/K

Aircooled liquid Chillers and Heat Pumps with axial fans, Scroll compressors and shell and tube exchanger

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The liquid Chillers and Heat Pumps of the TWA 212÷1102 S/K series, with R410A refrigerant, are designed for large-sized service sector or industrial ambients.
The units are characterized by multi-compressor design on double cooling circuit, to reach high energy performances, reduction of current at start-up, elimination of inertial tanks and excellent silent functioning. The use of components built in large series makes them highly reliable and the management of a high number of compressors allows increased life span with reduction of machine stopping risks and easier maintenance operations.
Are available as option the new EC Inverter fans with high available static pressure and efficiency.
Cooling only units are compliant to the ErP 2021 Regulation for process cooling application; for comfort cooling application they are compliant if provided with EC or ECH accessory (EC Inverter fans).
Heat pump models 726÷13010 are compliant to the ErP Regulation; models
15010÷36012 are compliant if provided with EC or ECH accessory (EC Inverter fans).

On request, units can be supplied with R452B or R454B refrigerant.

Versions

TWA - Cooling only
TWA/WP - Reversible Heat Pump
TWA/SSL - Super silenced cooling only
TWA/WP/SSL - Super silenced reversible Heat Pump

Power range

200-1062 kW
57.0-302 Ton

Features

Structure with supporting frame, made of galvanised sheet metal with additional protection provided by polyester powder coating.
Scroll compressors with oil sight glass, internal overheat protection and crankcase heater.
Axial fans directly coupled to an electric motor with external rotor.
Condenser made of copper tubes and aluminium finned coils.
Shell and tube evaporator with two independent circuits on the refrigerant side and one on the water side, complete with water differential pressure switch.
Cooling circuit shut-off valve on liquid line in 302÷1102 models.
Electronic expansion valve.
Electronic high and low pressure gauges.
R410A refrigerant. On request R452B or R454B refrigerant.
Electrical board includes: main switch with door safety interlock, fuses or magnetothermic switches, thermal protection relays for compressors and thermocontacts for fans.
Microprocessor control and regulation system.

Accessories

Factory fitted accessories

ISB BACnet MSTP protocol, RS485 serial interface
GD Double circulating pump gaskets for glycol >30%
FE Antifreeze heater for evaporator
FN Antifreeze heater for pipes
FZ Antifreeze heater for evaporator, single pump and pipes
FH Antifreeze heater for evaporator, double pump and pipes
SS Soft start
IS Modbus RTU protocol, RS485 serial interface
IST Modbus TCP/IP protocol, Ethernet port
GS Single circulating pump gasket for glycol >30%
ISBT BACnet IP protocol, Ethernet port
ISS SNMP protocol, Ethernet port
IAV Remote set-point, 0-10V signal
IAA Remote set-point, 4-20mA signal
IAS Remote signal for second set-point activation
IDL Demand limit from digital input
MN High and low pressure gauges
HRT/S Total heat recovery in series
RFM Cooling circuit shut-off valve on discharge line
RFL Cooling circuit shut-off valve on liquid line
CT Condensing control down to 0 °C
CC Condensing control down to -20 °C
BT Low water temperature kit
EC EC Inverter fans
ECH EC Inverter fans with high available static pressure
HR Desuperheater
SL Unit silencement
HRT/P Total heat recovery in parallel
TX Coil with pre-coated fins
EW External water connections
PU Single circulating pump
PUI Inverter single circulating pump
PD Double circulating pump
PDI Inverter double circulating pump

Loose accessories

CR Remote control panel
RP Coils protection metallic guards
FP Coils protection metallic guards with filter
AG Rubber shock absorbers
AM Spring shock absorbers
FL Flow switch

Technical data

			212	222	242	272	302	342	362	412	442	482	562	622	682	762	862	962	1102
Cooling	Cooling capacity (1)	kW	200	224	248	270	302	328	367	404	445	510	551	614	684	766	862	961	1062
Cooling	EER (1)		2,86	2,80	2,88	2,78	2,88	2,85	3,03	2,97	2,82	2,93	2,96	2,87	2,74	2,73	2,81	2,83	2,88
Cooling (EN14511)	Cooling capacity (1)	kW	199	223	247	269	301	326	365	403	444	508	549	611	682	763	858	958	1058
	EER (1)		2,80	2,75	2,84	2,74	2,84	2,79	2,97	2,94	2,79	2,89	2,92	2,82	2,71	2,69	2,76	2,79	2,84
	SEER (2)		3,80	3,83	3,96	3,99	3,85	3,96	4,07	4,27	4,31	4,29	4,31	4,39	4,32	4,33	4,31	4,34	4,32
	Energy Efficiency (2)	%	149	150	155	157	151	155	160	168	169	169	169	173	170	170	169	171	170
	SEER with EC or ECH accessory (2)		4,13	4,11	4,17	4,22	4,15	4,23	4,34	4,56	4,56	4,55	4,55	4,55	4,56	4,55	4,56	4,55	4,55
	Energy Efficiency with EC or ECH accessory (2)	%	162	161	164	166	163	166	171	179	179	179	179	179	179	179	179	179	179
Heating	Heating capacity (3)	kW	229	252	280	304	336	362	401	442	512	581	626	698	791	878	981	1100	1222
Heating	COP (3)		3,09	3,04	3,08	2,87	3,08	2,94	3,08	3,05	3,07	3,12	3,07	3,09	3,08	3,05	3,10	3,12	3,15
Heating (EN14511)	Heating capacity (3)	kW	229	252	280	305	336	363	402	443	513	582	627	699	792	879	982	1101	1223
	COP (3)		3,09	3,04	3,08	2,86	3,07	2,93	3,07	3,04	3,06	3,12	3,06	3,08	3,07	3,04	3,10	3,11	3,14
	SCOP (4)		3,22	3,20	3,21	3,22	3,21	3,22	3,23	3,21	3,20	3,19	3,19	3,19	3,19	3,19	3,19	3,19	3,19
	Energy Efficiency (4)	%	126	125	125	126	125	126	126	125	125	125	125	125	125	125	125	125	125
Compressor	Quantity	n°	3+3	3+3	3+3	3+3	4+4	4+4	4+4	5+5	5+5	6+6	6+6	6+6	6+6	6+6	6+6	6+6	6+6
Compressor	Capacity steps	n°	6	6	6	6	8	8	8	8	8	10	10	10	10	10	10	10	10
Evaporator	Water flow	l/s	9,44	10,58	11,71	12,75	14,26	15,49	17,33	19,08	21,01	24,08	26,02	28,99	32,30	36,17	40,71	45,38	50,15
	Pressure drops	kPa	45	42	45	50	48	56	55	45	33	43	54	59	46	55	62	47	52
	Water connections	DN	100	100	100	100	100	100	100	125	125	125	125	125	150	150	150	150	150
Electrical characteristics	Power supply	V/Ph/Hz	400/3/50	400/3/50	400/3/50	400/3/50	400/3/50	400/3/50	400/3/50	400/3/50	400/3/50	400/3/50	400/3/50	400/3/50	400/3/50	400/3/50	400/3/50	400/3/50	400/3/50
	Max. running current	A	152	166	179	191	216	233	250	274	316	350	375	422	485	545	598	676	746
	Max. starting current	A	276	299	347	359	349	401	418	407	484	518	543	600	662	759	812	938	1007
Unit with pump	Pump available static pressure	kPa	150	140	195	170	180	165	150	140	135	165	150	130	130	150	125	125	95
Unit with pump	Water connections	DN	100	100	100	100	100	100	100	100	100	100	100	150	150	150	150	150	150
Sound pressure	STD version (5)	dB(A)	70	70	70	72	72	72	73	73	72	73	75	76	76	76	76	76	77
	With SL accessory (5)	dB(A)	67	67	67	69	69	69	69	70	69	70	72	73	73	73	73	73	74
	SSL version (5)	dB(A)	64,0	64,0	64,0	66,0	65,0	65,0	67,0	66,0	66,0	67,0	69,0	70,0	70,0	69,0	70,0	---	---
Weights	Transport weight	kg	1703	1723	1813	2003	2253	2532	2642	2691	3283	3383	3565	3605	3840	4385	4705	5210	5330
Weights	Operating weight	kg	1750	1770	1860	2050	2310	2600	2710	2780	3380	3480	3670	3720	3970	4540	4860	5470	5590

Dimensions

			212	222	242	272	302	342	362	412	442	482	562	622	682	762	862	962	1102
L	STD	mm	2800	2800	2800	2800	4000	4000	4000	4000	5000	5000	5000	5000	5000	6200	6200	7200	7200
L	SSL	mm	2800	2800	2800	2800	4000	4000	4000	4000	5000	5000	5000	5000	6200	7200	7200	---	---
W	STD/SSL	mm	2200	2200	2200	2200	2200	2200	2200	2200	2200	2200	2200	2200	2200	2200	2200	2200	2200
H	STD/SSL	mm	2100	2100	2100	2100	2100	2100	2100	2100	2100	2100	2100	2100	2100	2100	2100	2100	2100

Notes

1 Chilled water from 12 to 7 °C, ambient air temperature 35 °C.
2 Seasonal energy efficiency of cooling at low temperature. According to EU Regulation n. 2016/2281.
3 Heated water from 40 to 45 °C, ambient air temperature 7 °C d.b./6 °C w.b.
4 Seasonal energy efficiency of heating at low temperature with average climatic conditions. According to EU Regulation n. 811/2013.
5 Sound pressure level measured in free field conditions at 1 m from the unit. According to ISO 3744.
N.B. (1) Weights of SSL and WP versions are specified on technical brochure.